Bernoulli's theorem

noun

1. Statistics. law of averages ( def 1 ).
2. Hydrodynamics. an expression of the conservation of energy in streamline flow, stating that the sum of the ratio of the pressure to the mass density, the product of the gravitational constant and the vertical height, and the square of the velocity divided by 2 are constant.

Word History and Origins

Origin of Bernoulli's theorem¹

1920–25; Bernoulli's theorem ( indef 1 ) named after Jakob Bernoulli; Bernoulli's theorem ( indef 2 ) named after Daniel Bernoulli

Example Sentences

But Bernoulli's theorem doesn't explain why that higher velocity on top of the wing lowers pressure.

From Salon

Bernoulli’s theorem attempts to explain lift as a consequence of the curved upper surface of an airfoil, the technical name for an airplane wing.

From Scientific American

Bernoulli’s theorem says that the increased speed atop the wing is associated with a region of lower pressure there, which is lift.

From Scientific American

Nevertheless, there are several reasons that Bernoulli’s theorem does not by itself constitute a complete explanation of lift.

From Scientific American

The second shortcoming of Bernoulli’s theorem is that it does not say how or why the higher velocity atop the wing brings lower pressure, rather than higher pressure, along with it.

From Scientific American